Draft rigging backstop



Mardi 21, 1933 D. s. BARRows DRAFT RIGGING BAcKsToP Fil-9d 0G12. 22. 1928 lllllllll 't `5 The principal object of my invention,

Patented Mar. 2l, 1933A UNITED STATES DONALD S. BARROWS, OF ROCHESTER, NEW YORK, ASSIGNOR T THE SYMINGTON COM- i PANY, OF NEW YORK, N. Y., A CORPORATON OF MARYLAND DRAFT R-VIGGING- BACKSTOP l Application led. October 22,1928. Serial No. 314,186.

This invention relates to draft rigging and more particularly to a backstop adapted to tie together the associated center sills and receive bufling forces from an associated yoke.

gen-

erally considered, is to provide a backstop for round ended yokes with the front wall correspondingly curved and reinforced by a hollow wall preferably oval in cross-section i0 extending rearwardly from said front wall to a transverse wall connecting intermediate portions of the side walls.

Another object of my invention is to provide a combined backstopV and center filler i casting with the front face concavely curved for engagement with a round ended'yoke and reinforced by a longitudinallyv disposed hol-` low spool elliptical in section extending from the front wall to a transverse wall in which 2'0 is formed the king pin aperture, the lower edge of said intermediate wall being provided with a transverse wall connecting the lower edges of the side walls and adapted for engagement with an associated centerplate.

A further object of my invention is to improve the construction of backstop castings by reducing the rear overhang, cutting off the top corners of the side walls to avoid bending in shipment and at the same time have alarger 30 percentage of the total number of 'connecting rivets substantially symmetrical with respect to the center line of draft.

Other objects and advantages of the invention relating to the4 particularV arrangement and construction of the various parts will become apparent `as the description proceeds. r

Referring to the drawing illustrating my invention, the scope whereof is -delined by the appended claims. Y y

Figure l is pl'airof a b'ackstop casting embodyingmy invention, a portion thereof being illustrated in horizontal section and a portion of an associated yoke being diagram- 'V45 inaticallyindicated.

Figure 2 is a longitudinal vertical sectional view on the line 2 2 lof Figure l, looking in the direction of the arrows. n f

Figure 8 is a artial end elevational land '39 .partial transverse sectional view on the line 3 3 of Figure l, looking in the direction of the arrows.

Figure 4 is a transverse vertical sectional view. on the line 4 4 of Figure 1, looking in the direction ofthe arrows. y

Referring to the drawing in detail, like parts being designated by like referencecharacters,1 have shown a dra-ft rigging backstop casting 1 `which preferably also functions as a center filler casting and is provided with side walls 2 adapted for connection with associated center or draft sills (not shown) and a front wall 3 preferably concavely curved on its front face to receive a round ended yoke diagrammatically indicated at 4: and adequately reinforced as more fully described f hereinafter for receiving llou-fling forces therefrom.

Intermediate portions of the side vwalls 2 and the front wall 3 and preferably connected F-b by a. pair of. diagonally extending vertical walls', which walls areY also preferably approximately radial with respect to the curvature of the front wall 3. Thefront wall 8 forwardly or outwardly of said connecting and reinforcing walls 5 is preferably indented as indicated at 6, and the corresponding portions of the side walls 2 are apertured` at 7 for receiving connecting rivets (not shown);

The front wall 3 is preferably additionally reinforced bym'eans of a longitudinally extending Acenter spool or tubularl web 8 whichV connects with a. transversewall 9 extending between intermediate portions ofthe Y side walls 2 and preferably expanded at its central portion to provide aY vertical aperture l() for receiving an associated king pin (not slrown). The major axis of the voval or elliptical section of the reinforcing web 8 is preferably horizontal and the side edges'of said reinforcement are connected with the side walls 2 by horizontal Webs 1l as most clearly shown in Figures l and 4. For still further reinforcing: the front wall 3, longitudinally disposed preferably triangular gussetsl2 arepreferably providedy above the reinforcing web 8 thereby bracing the upper extension or flanged portion 13' of the front wall above the reinforcingweb 8. The purpose of this extension is to raise the center of 10b the front wall 3 to correspond with the center line of draft which is above that of the elliptical reinforcement 8. In order to provide for core removal, the front wall 3 is preferably apertured as indicated at 1li to give access to the interior of the reinforcing web 8 and the hollow in said web is also joined with the king pin aperture 10 as shown most clearly in Figures 1 and 2.

The transverse 9 is preferably increased in depth upwardly toward the-side walls 2 as indicated at 15 to properly reinforce said walls, and the lower edge is connected to a transverse web 16 connecting the lower edges of the walls 2. Said web 16 is preferably horizontal adjacent the center and upwardly indented adjacent the side walls as indicated at 17 for receivingthe lower flanges of the associated center sills (not shown). The web 16 is of sufficient width to provide the necessary bearing area for the associated center plate (not shown). The web 16 is desirably reinforced by longitudinal preferably centrally disposed triangular Webs or gussets 18 and 19, the former of which merges into the hollow post with the king pin aperture 10 and the latter of which connects' with the oval reinforcement 8. Y

YAlthough the oval reinforcing web 8 i preferably not continued rearwardly' of the ltransverse web 9, that portion of the casting is preferably provided with a transverse curved web 20, the central portion of which corresponds .in elevation with the top of the reinforcement 8 and the sides of which correspond with the connecting webs 11 so that the weby 2O is preferably convex upwardly adj acent'tlie longitudinal center line to correspond with the corresponding portion of the reinfoicement 8 and on either side there- 'of concave upwardly to smoothly merge into horizontal portions 21 corresponding in elevation with the websll and connecting with the side walls 2 of the casting. rlhe rear edge of the web 20 is preferably reinforced by a'transverse vertical web or flange 22, the top edge of which is preferably liush with thetop of the curved web 20 and the bottoni edge of which preferablyk corresponds with the bottom of thehorizontal side portions 21. The side webs or walls'2 are preferably continued rearwardly beyond the rear wall or web 22 to provide sucient riveting area and are reinforced with respect to said wall by triangular webs or gussets 23. In order to avoid bendingl during shipment, the top corners of the side walls 2 are desirably cut off as indicated at 24 and 25, and the lower corners rounded as indicated at 26 and 27.

From the foregoing disclosure, it will be seen that l have devised an improved backstop for a round ended yoke in which the correspondingly curved `front wall is ade-Y quately reinforced by an elliptical center spool spanning the critical area of the casting. The casting is of minimum weight consistent with strength on account of a reduction of the rear overhang and the removal of the top corners of the side walls, which at the same time avoids bending thereof in shipment. As an additional result, a larger percentage of the total number of connecting rivets, the apertures for which are indicated generally by the reference character 28, vare arranged'substantially symmetrical with respect to the center line of draft which is above that of the elliptical reinforcement for the front wall.

Having now described my invention, I claim:

1. A backstop casting comprising side walls adapted for connection with associated center sills, a front wall concavely curved horizontally on its frontl face and adapted to receive buliting forcesA from the correspondingly curved end of an associated yoke, forwardly and inwardly converging webs connecting intermediate portions of said side walls and front wall, said wall portions forwardly of said webs being apertured for receiving connecting rivets.

2. A backstop casting comprising side walls adapted for connection with associated center sills, a front wall adapted to be engaged by an associated yoke, a transverse wall intermediate the ends of said casting with the central portion thereof expanded into a hollow vertical post providing a king pin opening, and reinforcing means extending between said front and transverse walls, and formed as a hollow web substantially elliptical in section, the hollow in said web joining the king pin opening and a transverse floor portion connecting the lower edges of said side walls and extending beneath the hollow post and adjacent portion ofthe reinforcement.y i

3. A backstop casting comprising side 'walls adapted for connection with associated v center sills, a front wall adapted to engage an associated yoke, a transverse reinforcing web disposedV rearwardly of said front wall and uniting with said side walls between the upper and lower edges thereof, said web being vconvex upwardly adjacent the longitudinal center line and concave upwardly on either side thereof until it merges with the side wallsY of the casting, and a connecting transverse vertical web extending along the rear edge of said reinforcing web and disposed beneath said web adjacent the longitudinal center line of the casting and above said web adjacent the side walls.

4. A backstop casting comprising side walls adapted for connection with associated vcenter sills,` a front wall with its front face concavely curved and adapted to receive buffing forces from the Vcorrespondingly formed end of an associated yoke, the curved front wall extending forward to meet the forward portions of the side walls and both apertured adjacent the junctions to receive rivets for connection with associated sills, longitudinal reinforcing means for said front wall comprising a hollow web oval in section extending rearwardly therefrom, the longitudinal center line of said web being slightly below the longitudinal center line of the associated lo yoke, and a transverse web connecting the side walls and merging with the reinforcing means.

5. A backstop casting comprising side walls adapted for connection with associated sills, a front wall horizontally curved and adapted to receive buing forces from a correspondingly curved end of an associated yoke, said side walls having their upper edges sloping upwardly from the front wall and sloping downwardly adjacent the rear portions thereof to avoid sharp corners, a tubular web extending rearwardly from the front wall and formed of a greater horizontal than Vertical dimension to span the critical area of and reinforce said front wall, said side walls meeting the curved front wall forwardly of the junction with the reinforcing web and apertured forwardly of said web for connecting rivets, a transverse vertical web reinforced by a horizontal rearwardly extending web joining the side walls of the casting intermediate the ends thereof, the central portion of said web being formed hollow to provide a king pin opening, the cavity in the tubular reinforcing web joining the king pin opening, and a transverse floor portion connecting the lower edges of said side walls and joined to the transverse and tubular. reinforcing webs. In testimony whereof I affix my signature.

DONALD S. BARROWS. 

